Concrete-mixer.



PATENTED NOV. 14, 1905.

J. W. PAGE. CONCRETE MIXER.-

APPLICATION FILED JAN 20 1904 No. 804,261. 7 PATENTED NOV. 14, 1905.

J. W. PAGE. CONCRETE MIXER.

APPLICATION FILED JAN. 20, 1904.

2 SHEETS-SHEET 2.

of the structure. upon suitable braces supported on the platis notmaterial. B is provided with a gear C in mesh with a UNITED STATESPATENT OFFICE.

Specification of Letters Patent.

Patented Nov. 14, 1905.

Application filed January 20, 1904. Serial No. 189,793.

To all whom, it fitay concern:

Be it known that I, JOHN W. PAGE, a citizen of the United States ofAmerica, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inConcrete-Mixers, of which the following is a specification.

My invention relates to certain new and useful improvements inconcrete-mixers; and

its object is to produce a device of this class which shall have certainadvantages, which will appear more fully and at large in the course ofthis specification.

To this end my inventionconsists in certain novel features ofconstruction, which are clearly illustrated in the accompanying drawingsand described in this specification.

In the aforesaid drawings, Figure 1 is a side elevation of my improvedconcrete-mixer. Fig. 2 is a plan viewof the same. Fig. 3 is alongitudinal section in the line 3 3 of Fig. 2. Fig. 4- is an end :viewof the mixingchamber proper looking in the direction of the arrow 4 inFig. 1. Fig. 5 is a perspective View of the mixing-chamber properlooking directly down upon the same; and Fig. 6 is a view similar toFig. 5, but showing the mixer and its contents in a different position.

Referring to the drawings, A is a suitable framework or platformwhichforms a supporting-base for the device, and this platform is supportedby suitable wheels a, so that the entire structure can be readily movedabout from place to place. Substantially at the center of the platformis journaled a shaft B,

inclined at an angle of about forty-five degrees and extending upwardtoward the rear This shaft is journaled form A, the particularconstruction-of which Thelower end of this shaft worm 0 upon a shaft CThis shaft C in the preferred form of construction is provided with twoloose pulleys c and a fixed pulley c.

D indicates a suitable shaft driven by an engine E, mounted on theplatform A. On

the shaft D there are three fixed pulleys (Z CZ and two belts run overthe pulleys (Z d and 0 a, one of the belts D being a straight belt andthe other belt D being a twisted belt. A belt-shifter F is provided, bywhich the two belts D D can be moved together in either direction. Itwill be seen that as these two belts are moved one way or the other onebelt or the other will always be running over the fixed pulleys on theshaft C while the other belt will be running over a loose pulley, andthe direction of rotation of the shaft C will be determined by whichbelt of the two runs over the fixed pulley. In this Way a simple andefiicient reversing mechanism is provided by which the direction ofmovement of the shaft 0 and consequently of the shaft B, can be readilychanged. The particular form of the reversing mechanism is not essentialto my invention; but it is essential to certain features of my inventionthat some sort of reversing mechanism be provided, and it will beevident from a further description that certain features of my inventioncan be used without any reversing mechanism whatever.

At the upper end of the shaft B is mounted the mixing-chamber proper.The bottom of this chamber consists of a flat plate G of wood or metal,preferably of the form indicated in Fig. 4:. At the periphery of theplate G are side walls at right angles to said base, the side wallsbeing indicated in the drawings by G. It will be seen that the sidewalls are provided with suitable gaps and that at the gaps in the sidewalls the said 'walls overlap, one end extending outside of and beyondthe other end, and that in the various gaps the outer portion of thewall extends in the same direction from the gap in all cases.

In the operation of this device cement, sand, and crushed stone or othersuitable concrete-forming material is poured into the mixing-chamber bymechanism which will hereinafter be described and the mixing-chamber isrotated in the direction indicated by the arrow in Fig. 4:. The materiallies, when the chamber is at rest, in the angle formed between the sidewalls and the bottom of the mixing-chamber, and as the chamber isrotated the material moves upward, being carried by frictional contactwith the wall until it reaches a point where the inclination of the wallis sufiiciently steep to. cause it to roll or tumble down, and when thispointis reached the material will roll across the bottom of themixingchamber to the lowest point, in this way being thoroughly mixed.The material will pass the gaps in the side walls as long as themixing-chamber is rotated in the direction indicated by the arrow inFig. 4, for the material will fall along the inside wall where two wallsoverlapand will have no tendency to pass under the lower portion of themixing-charm her, and as the chamber is rotated in thereverse directionthe material will'pour out into the wagon or receptacle. If desired, aspout may be used and the concrete carried off to any desired point.

In order to secure a more perfect mixing with my improved device, Iprovide a bar H, which crosses themixing-chamberdiametrically and is outof contact with the bottom of the same. In the use of a device of thissort the larger stones tend to lie uponithe top of the pile of materialand will consequently be engaged by this cross-bar, while the finermaterial passes freely underneath the same. As the device is rotated the:fine material rolls alongthe side wall, being turned over and over andthoroughlyrmixed;

but the heavy material which'engages with the cross-bar is prevented bythe cross-bar from rolling down,as seen in Fig. 5,:andit is held by thecross-bar until the inclination of the cross-bar is sufficientto causethe heavy material to fall directly across the'mixingchamber instead ofrollingalong the :wall. The heavy material is seen inthis position. thatis, just after ithas fallen across the chamber in Fig. 6. Continuedrotation of the chamber will cause the finer material to eventuallyentirely cover vthe heavier-material. Inother words, this cross-barcauses the heavysmaterial to fall straight across the chamber. insteadof rolling along the walls, as does the fine materiaLiand-as the heavymaterialzfalls straight across the chamber it reaches the side wallbefore the finer material does and as a result is in position to becovered by the finer material when the latter reaches the proper pointonthe walls. By the use of this crossbar then the heavy material I isthroughly mixed with the fine'material, whereas in the absence of thiscross-bar such complete-mixing is difficult, because the heavy materialmerely rollsalong the top of the pile of'stufl' in the mixing-chamber.

In addition to the mixing-chamberand the device for rotating the same Iprovide upon my improved structure a device for introducing theconcrete-forming material for-mixing,

and this device will now bedescribed. To

the rear of the frame A, as at 1 are pivotally secured two barsL-connected by a transverse member I, these three members togetherforming a'swinging frame. At the rearofthis frame are rigidly securedtwo rdownwardly -;,ex=tending members 1 each formed of two bars or rods,and near the end :of these'members is a transverse shaft 2'. Upon theshaft i is pivoted a-scoop J, which is, roughly speaking, in the shapeof a rectangular box having the top and one end re-. moved, as is shownin the drawings. The

' parts are so arranged that when the swinging frame is swung down tothe position illustrated in Fig.1, with its lower-end resting upon theground, the lower-end of-the scoop 'J will also swing down,-'itsrotation about its shaft beingilimited :by engagement with a transversebare", extending across the-lower end of lthe members I. -Whenthepivoted frameworkisswung :upsthis-scoop will take theshaft,=asidesired,- to raise :and. lower: the

pivoted framework. :Inorder to swingthis scoop upon its :pivot "'1fromwposi-tion ishown in'solid lines in: Fig.1 to that shown inzdotted 5lines in the same figure, ropes y' extend from the lower rear corners'ofthe scoop, as seen in solid lines inIF-ig.- 1, overpulleys j ontheswinging'frame; the opposite endrof the ropes being secured to :theframework A-oflthe machine-.at apoi-nt below the pivotil of theswingingfframe. "Aswathe swinging frameis swung up itis evident rthatthe distance between the pulleys j. and the pointsof attach- ..ment ofthe ropes y' -withtheiframewo'rk A will beincreased,andiconsequentlywthe ropes jwill be drawnitightand-:will drawthe point of attachment-of the ropetogthe scoop toward the pulleysjyth-us tiltingthe open endaofthe scoop down toward the mixing-chamber.A

short rope j connects' the lower= end of the scoop with the cross-bariiandprevents the scoop from tiltingitoo far whenttheswinging :frame isin its raised position.

@Irealizethat considerable variation ispos- .sible in 1 the details ofthis construction withand} therefore .do not intend to'limitamyselftothe zspecific form herein shown-andde scribed.

I claimsas new-anddesire to secure bylLetuters Patent 1. 5 In a deviceof'the class'described, the combination with: a suitable framework, .ofa mixing-chamber supportedithereby and rotatable .upon an inclined=axis,a' swinging frame pivoted to the framework below the chamber and adaptedtobe swung into.:position above'the same, a-scoop p1voted=to=theswinging frame, means for movlng the swinglng frame: about its pivot,and means for automatically swinging the scoop upon its pivot on theframe to dump the contents of the scoop into the mixing-chamber as theswinging frame is raised.

2. In a device of the class described, the combination with a suitableframework. of'a mixing-chamber supported thereby and rotatable upon aninclined axis, a swinging frame pivoted to the framework below thechamber, and adapted to be swung into position above the same, a scooppivoted to the swinging frame, means for moving the swinging frame aboutits pivot, a rope extending from the framework over pulleys on theswinging frame to the scoop, and adapted, as the swinging frame israised, to swing the scoop upon its pivot to dump its contents into themixingchamber.

3. In a device ofthe class described, the combination with amixing-chamber mounted on hold it until the same falls by its ownweight,

whereby the coarse material is deposited underneath the fine materialsubstantially as and for the purpose set forth.

In witness whereof I have signed the above application for LettersPatent, at Chicago, in the county of Cook and State of Illinois, this16th day of January, A. D. 1904:.

JOHN W. PAGE.

Witnesses:

RUssnLL WILES, CHAS. O. SHERVEY.

